Fujimoto Junpei FUJIMOTO Junpei

Articles:  1-13 of 13

  • QED Radiative Corrections to Non-Annihilation Processes Using the Structure Function and the Parton Shower

    KURIHARA Yoshimasa , FUJIMOTO Junpei , KATO Kiyoshi , MUNEHISA Tomo , SHIMIZU Yoshimitsu , TOBIMATSU Keijiro , High Energy Accelerator Research Organization , High Energy Accelerator Research Organization , Department of Physics Kogakuin University , Faculty of Engineering Yamanashi University , High Energy Accelerator Research Organization , Department of Physics Kogakuin University

    Inclusion of the QED higher-order radiative corrections in the two-photon process e<SUP>+</SUP>e<SUP>-</SUP> → e<SUP>+</SUP>e<SUP>-</SUP>μ<SU …

    Progress of Theoretical Physics 103(6), 1199-1211, 2000-06-25

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  • Automatic Computation of Cross Sections in HEP : States of GRACE System

    YUASA F. , FUJIMOTO J. , ISHIKAWA T. , JIMBO M. , KANEKO T. , KATO K. , KAWABATA S. , KON T. , KURIHARA Y. , KURODA M. , NAKAZAWA N. , SHIMIZU Y. , TANAKA H.

    For the study of reactions in High Energy Physics (HEP) automatic computation systems have been developed and are widely used nowadays. GRACE is one of such systems and it has achieved much success in …

    Progress of Theoretical Physics 138, 18-23, 2000-04-28

    DOI  NDL Digital Collections  References (27) Cited by (1)

  • A QED Shower Including the Next-to-Leading Order Logarithmic Correction in e^+e^- Annihilation

    MUNEHISA Tomo , FUJIMOTO Junpei , KURIHARA Yoshimasa , SHIMIZU Yoshimitsu , Faculty of Engineering Yamanashi Univrsity , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK)

    We develop an event generator, NLL-QEDPS, based on the QED shower including the next-to-leading order logarithmic correction in <em>e<sup>+</sup>e</em><sup>-</sup> …

    Progress of Theoretical Physics 103(3), 587-612, 2000-03-25

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  • Hard Photon Distributions in e^+e^- Annihilation Process by QEDPS

    KURIHARA Yoshimasa , FUJIMOTO Junpei , MUNEHISA Tomo , SHIMIZU Yoshimitsu , National Laboratory for High Energy Physics(KEK) , National Laboratory for High Energy Physics(KEK) , Faculty of Engineering Yamanashi University , National Laboratory for High Energy Physics(KEK)

    The validity of a photon shower generator QEDPS is examined in detail. This is formulated based on the leading-logarithmic renormalization equation for the electron structure function and it provides …

    Progress of Theoretical Physics 96(6), 1223-1235, 1996-12-25

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  • Improved QEDPS for Radiative Corrections in e^+e^- Annihilation

    MUNEHISA Tomo , FUJIMOTO Junpei , KURIHARA Yoshimasa , SHIMIZU Yoshimitsu , Faculty of Engineering Yamanashi University , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK)

    The generator QEDPS, a parton shower model in QED, developed by the present authors has been improved. By a careful study on the shower algorithm, it was found that some finite contributions have been …

    Progress of Theoretical Physics 95(2), 375-388, 1996-02-25

    DOI  References (21)

  • Jets in Photon-Photon Collisions--From TRISTAN to J/N-LC

    P AURENCHE , J-Ph. GUILLET , M FONTANNAZ , Yoshimitsu SHIMIZU , Junpei FUJIMOTO , Kiyoshi KATO , Laboratoire de Physique Theorique ENSLAPP-Groupe d'Annecy , Laboratoire de Physique Theorique ENSLAPP-Groupe d'Annecy , Laboratoire de Physique Theorique et Hautes Energies Universite de Paris XI , Physics Department KEK , Physics Department KEK , Physics Department Kogakuin Uniuersty

    We study jet production in photon-photon reactions at the next-to-leading logarithm accuracy. Special emphasis is placed on the discussion of the theoretical uncertainties and on the role of the hadro …

    Progress of Theoretical Physics 92(1), p175-188, 1994-07

    DOI 

  • Monte Carlo Approach to Radiative Corrections in Bhabha Scattering

    Junpei FUJIMOTO , Yoshimitsu SHIMIZU , Tomo MUNEHISA , National Laboratory for High Energy Physics(KEK) , National Laboratory for High Energy Physics(KEK) , Faculty of Engineering Yamanashi University

    A new Monte Carlo model is proposed for radiative corrections to Bhabha scattering by extending QEDPS developed for multi-photon emission in muon pair production in e^+e^- annihilation. This is a QED …

    Progress of Theoretical Physics 91(2), p333-340, 1994-02

    DOI 

  • Monte Carlo Approach to Radiative Processes in e+e- Annihilation

    Junpei FUJIMOTO , Yoshimitsu SHIMIZU , Tomo MUNEHISA , National Laboratory for High Energy Physics(KEK) , National Laboratory for High Energy Physics(KEK) , Faculty of Engineering Yamanashi University

    We present a new approach to radiative processes in e^+e^- annihilation based on a Monte Carlo method. This is nothing but the QED version of the parton shower model studied extensively in QCD. It is …

    Progress of Theoretical Physics 90(1), p177-185, 1993-07

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  • Vector Boson Pair Productions with a Hard Photon Emission

    Keisuke FUJII , Junpei FUJIMOTO , Junichi KANZAKI , Yoshimasa KURIHARA , Akiya MIYAMOTO , Toshihumi TSUKAMOTO , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK)

    The cross sections for vector boson pair productions associated with a hard photon emission (e^+e^-→ W^+W^- γ and ZZγ) were calculated. The used calculational procedure is explained, putting emphasis …

    Progress of Theoretical Physics 88(1), p103-110, 1992-07

    DOI 

  • Numerical Approach to One-Loop Integrals

    FUJIMOTO J. , Yoshimitsu SHIMIZU , Kiyoshi KATO , Yoshio OYANAGI , National Laboratory for High Energy Physics (KEK) , National Laboratory for High Energy Physics (KEK) , Department of Physics Kogakuin University , Department of Information Science University of Tokyo

    Two numerical methods are proposed for the calculation of one-loop scalar integrals. In the first method, the singularity is cancelled by the symmetrization of the integrand and the integration is don …

    Progress of Theoretical Physics 87(5), p1233-1247, 1992-05

    DOI  Cited by (3)

  • Radiative Correction to Jet Production in e+e- Annihilation

    Junpei FUJIMOTO , Kiyoshi KATO , Yoshimitsu SHIMIZU , Department of Physics Nagoya University , Physics Department Kogakuin University , National Laboratory for High Energy Physics

    The radiative correction to the jets production is calculated for the high energy e^+e^- annihilation. The correction to the asymmetry is about a few percent for the heavy quark jets in the TRISTAN re …

    Progress of Theoretical Physics 79(3), p701-709, 1988-03

    DOI 

  • Radiative Correction to e+e-→γγ in Electroweak Theory

    Junpei FUJIMOTO , Masataka IGARASHI , Yoshimitsu SHIMIZU , Department of Physics Nagoya University , Department of Physics Tokai University , National Laboratory for High Energy Physics

    The lowest-order radiative corrections to e^+e^-→γγ in the energy regions of TORISTAN,SLC and LEP are calculated in the standard SU(2)×U(1) theory. The one loop virtual corrections due to heavy boson …

    Progress of Theoretical Physics 77(1), p118-131, 1987-01

    DOI 

  • Distributions for e+e-→3γ at High Energy

    Junpei FUJIMOTO , Masataka lGARASHI , Department of Physics Nagoya UniverSity , Department of Physics Tokai University

    The acollinearity and energy distributions without experimental cuts are numerically and analytically obtained for e^+e^-→3γ at high energy. These distributions with cuts and the transverse momentum d …

    Progress of Theoretical Physics 74(4), p791-806, 1985-10

    DOI 

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